Application Of Distributed Blockchain In Distribution Automation System

Distribution network automation system is an automation system that enables distribution enterprises to monitor,coordinate and operate distribution equipment in a real-time manner in the distance.It forms a distribution management system together with distribution network data acquisition and monitoring(SCADA system),distribution geographic information system and demand-side management.For the current distribution network automation system,there is a high degree of centralization in the main station system of power distribution automation.lead to poor systemic disaster tolerance and poor expansion.At the same time,it also leads to the power dispatcher easy to deny.There is a problem of weak security protection measures for power distribution automation terminals and Business data is easy to be monitored and tampered with.This article proposes a distributed blockchain power distribution automation system.This system has the advantages of decentralization,strong disaster tolerance,non-repudiation,good scalability,and business data security.So as to reduce the probability of network security events,improve the security of the power grid,reduce the time of power outage,and reduce the investment cost of the power grid.Firstly,according to the Hyperledger Fabric Alliance chain framework.at the same time,combined with the current network structure network structure.According to the transmission medium,designed the distributed blockchain wired power distribution automation system network structure and distributed blockchain wireless power distribution automation system network structure.Qualitative analysis the advantages of distributed blockchain power distribution system are decentralized,disaster-tolerant,resistance deny,scalability,and business data security.Secondly,the security of a distributed blockchain power distribution automation system in a certain scenario through theoretical calculation quantitative analysis is better than the current power distribution automation system.Finally,an experimental model was designed based Hyperledger Fabric open source project.And i wrote a measurement of chaincode.Experimental verification of the function of a measurement of chaincode for the distributed blockchain power distribution automation system.Use Hyperledger Explorer to display the experimental results,At the same time,use the Hyperledger Caliper testing the experimental system benchmark performance.Fixed sending of 500 transactions by using the Hyperledger Caliper tool,change the frequency of sending transactions,after multiple rounds of testing,the average delay and throughput of the system are obtained.In the Set Value test results,the average number of transactions per second is 4,the maximum delay is 3.15 seconds,the minimum delay is 0.64 seconds,and the average delay is 1.7 seconds.In the Query value test results,the average number of transactions per second is 65.1,the maximum delay is 0.22 seconds,the minimum delay is 0.03 seconds,and the average delay is 0.07 seconds.Analysis of experimental results and experimental performance data.In this paper,it takes 0.25 seconds to write data once and 0.015 seconds to query data once in the experimental network.Meet the requirements of the State Grid Corporation of China that "the time of switch displacement transfer to the main station is less than 30 seconds" and "the time of remote control completion is less than5 seconds".The expected effect of the distributed blockchain power distribution automation system was verified.